Zachary King is a convert to Catholicism ^{[7] [8]} after claiming to be an active member in the occult and an organization called the World Church of Satan, or Satan's World Church, for more than twenty-six years. Before his conversion, he describes having performed Satanic ritualistic abortions inside abortion clinics,. ^[1] He claims to have worked as a high wizard carrying out abortions and doing spellwork for people who came to him. ^{[2] [3]}

In his interviews and testimonies, ^{[4] [5]} he tells his conversion story of working in a mall and receiving a Miraculous Medal from a devout Catholic woman he had never previously met but who told him of his past. The woman in question made the, to him, astounding statement, "The Blessed Mother is calling you into Her army". Initially he assumed she must be the representative of some pagan deity cult, and he was not interested. She said, of the Miraculous Medal, that it was very powerful. King says that he could tell, at that time, if an object had been used in the casting of a spell, and would know whether something was powerful or not.

This, he was adamant, was powerless, and he took it into his hand, at which point he no longer saw the mall, but everything disappeared from his sight, except himself and the woman, whom he heard telling him the sins of his past life.

Terrified, he assumed this was some kind of magic.

During this episode he realised that "the Blessed Mother" referred to the Mother of God (an expression he has no recollection of hearing previously), and he received the grace of conversion to Catholicism. He was received into the Catholic Church on 11 May 2008, the Feast of Pentecost. He currently runs the All Saints Ministry and is writing two books about his experiences titled Satan Loves Me, He Loves Me Not and Abortion is a Satanic Sacrifice.